Portable priming device



Feb. 17, 1925. 1,527,029

c. M. DAVISON PORTABLE PRIMING DEVICE Filed June 20, 1924 Patented Feb.17, 1 925.

UNITED STATES PATNT OFFICE.

CLARENCE M. DAVISON, 0F BALTIMORE, MARYLAND, ASSIGNOR T0 POOLE ENGINEER- ING- 82; MACHINE COMPANY, OF BALTIMORE, MARYLAND, A CORPORATIONOF MARYLAND.

PORTABLE PBIMING DEVICE.

Application filed June 20, 1924. Serial No. 721,278.

To all whom it may concern."

Be it known that I, CLARENCE. M. DAVI- SON, a citizen of the UnitedStates, residing at Woodberry Station, city of Baltimore, and State ofMaryland, have invented certain new and useful Improvements in PortablePriming Devices; and I do hereby declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming part of this specification.

This invention relates to priming devices and particularly to portableprimers for internal combustion engines.

The rates of insurance companies for in surance on internal combustionengines vary according to the nature of the motive fluid used in theengine; the rates on engines using gasolene, for instance, beingconsiderably higher than those on engines using the lower hydrocarbons,such as kerosene. For this reason, the present invention seeks toprovide a primer in which gasolene may be used as the priming charge butin which, due to certain novel features of construction, the vapor ofthe gasolene, combined with the proper proportion of air, will be fed tothe combustion chamber only for a few moments during the priming of theengine. N o gasolene in its liquid state can possibly reach the normalmotive fluid passage of the engine or the combustion chamber thereof.

These novel features consist principally in constructing the primer sothat it cannot possibly be filled or recharged with gasolene while theengine is running and it cannot be overcharged,that is, it is soconstructed that any excess gasolene that may be deposited in the primerwill be immediately drawn off or wasted. Under these circumstances, nogasolene, in liquid form, can possibly reach the combustion chamberwhile the latter is in operation because only a small quantity ofgasolene can be placed in the primer and when the primer is put into useno more gasolene can be deposited in it without removing it from theengine which in the present invention will result in the operation ofthe engine being stopped.

With these and other objects in view the invention consists in certainnovel details of construction and combinations and ar rangements ofparts, all of which will be hereinafter more fully described and thenovel features thereof particularly pointed out in the appended claims.

The accompanying drawings consist of a figure, a vertical sectionalView, illustrating a portion of an internal combination engine having aprimer attached thereto, the primer shown, embodying the preferredconstruction contemplated by the present invention.

A portion only of the engine structure proper is shown, and this more orless conventionally. The usual motive fluid supply duct 10 is shown insection with an arrow indicating the direction of flow therefrom to thecombustion chamber of the engine. Preferably there is an overhangingflange 11, or the like, at the side of the engine for the attachment ofthe primer, the under face of said projection being formed with anannular recess 12 which communicates with said duct 10 by means of ashort piece of piping 13 secured at its ends in the engine and in anaperture 14% in the flange. As will be presently described, the primeris secured to said flange and the priming vapors escaping or dischargedfrom the primer flow through the pipe 13 to the duct 10 where theycommingle with the motive fluid or are conveyed to the combustionchamber.

The primer in the preferred form illustrated comprises an elongatedcylindrical body or casing 15 adapted to be filled with a suitableabsorbent material 16 that will take up or become saturated with primingfluid, usually gasolene, that is poured or deposited in the primerthrough the open end 17 thereof. Usually, the size of the primer body issuch that of about a gill of gasolene will be required to completelysaturate the material 16, this quantity having been found suflicient torun the engine for about three minutes. For supplying air to thegasolene vapors that will be discharged from the prime-r to the duct 10there is a comparatively small opening formed in the opposite'end of theprimer body and a tube or other passage 18 leading from said openmg isprovided in the absorbent material, said passage extending preferablymore than half way the length of the body and back upon itself to apoint where itterminates in the material immediately above its entranceend.

It will 'be noted that the recess 12 in flange 11 and the open. endportion of the primer are each of frustorconicalshape, the end of theprimer fitting tightly in said recess when it is attached to the enginefor use. 'ljhe primer is detachably secured on the engine by any desiredmeans such as a snao tastener in the form of a ball 19 on that extendsover the flange 11 and snaps into a recess in said fian'ge.- It theprimer has been charged and is in place as shown it is apparent that ainwill be sucked in through passage 18 and through the; ma-

terial 16, and that air andthe vapors from the; gasolene, as a firingmixture, will be suckedithrough thepipe 13 and duct-10 to the.combustion chamber of the engine.

With the primer constructed and arranged as described-it cannot betilled while the engine isrunning because to fill it, it

must be removed from recess 12 in which event pure airwillbfiow throughthe then unrestricted-pipe 131- insuch quantities as to kill the:engine. A further advantage ofjthis primer is that an excessive quantityof fluidicannot be placed thereinv because any excess willxbe siphonedofl (out) due to the faict that-the interior end of pipe 18 terminates.above the outer-end thereof. Thus more gasolenethan isnormally necessaryfor one priming, of theengine cannot be-deposited in the primer and thisbeing true there is nospossibility of? the engine being operated for anyappreciable length of time with gasolene as-itsoperating motive fiuid.This,.and the fact that the primer cannot be filledwhile the engine isoperatingunder its normal motive fluid, renders ,the primer acceptableto the underwriters 1S0 that they donot increase their ratesof'insurance on. the lower hydrocarbonpengines when thistype of primeris employed. As a.rule, the-insurance companies have chargedtheirgasolene engine rates to. owners of low hydrocarbon engines when thelatter are provided with gasolene primers but asthe primer perfected byapplicant and 1 claimed herein has met with the approval of theunderwriters, such owners of engines using the lower hydrocarbonsreceive the benefit of the lower insurance rates.

hat is claimed is 1.111 combination with the motive fluid supply vduct.of an. internalcombustion engine, a primer having .an opening fordepositing the priming fluid therein, means for attaching the primer tothe engine, means for conveying the priming charge tromuthe primer tosaid duct, the filling opening in theprimer being accessible only when.the primer is detacheditrom. the engine. V

2. In combination with the motivefiuid supply duct of an internalcombustion enand said opening in the primer, the opening in the primerbeing accessibl'eon'ly when the primer is detached from the engine andsaid. passage open to the air whereby the mixture supplied to the enginethrough the passage, when the primer is detached, will be such as torender the engine inoperative. 7V

3. A- primer for internal combustion engines comprising a body adaptedto contain the priming charge, said body having an air passagecommunicating with the interior of the body adjacent one end of thelatter and with the exterior ot'saidbody and there being an opening inthe opposite end: of the body for fillingithe priznerand through whichthe priming charge may be drawn into the engine, and means for:supporting the primer with itsdischargo opening in connnunicationwiththe motive fluid supply system of the engine, the opening for fillingthe primer being inaccessible when the pri merit attached to the engine.

l. A primer for internal COHIlJUStlOHQH- age gines comprising a bodyhaving an opening a through which the primer is charged and discharged,means for supporting the primer with said opening communicating with theengine cylinder, said charging opening being. inaccessible when theprimer is attached to the engine whereby the primer mustabe removed fromtheengine for filling, and means for supplying air to theinterior of theprimer.

I A primer for internal combustion engines oonnprisinga body having anopening at one end through which the priming-fluid is deposited in theprimcrand throu h which the priming charge is drawn to the engine, anabsorbent material within the boc y, and an air duct leadingtrom the ereterior of the primer and terminating-in the interior thereof adjacentthe end opposite the hlhng openmg whereby an comlng through the ductwill be drawnthrough the absorbent material, and means 1. O1=Cl8-tachably securlng the primer to the engine with the charging opening endthereof upvent and its terminals, whereby excess priming fluid depositedin the primer will escape through the air rent.

7. A portable primer for internal eo1nbustion engines embodying a bodyhaving one end open for depositing priming fluid therein and throughwhich the priming vapors are discharged, a filler of absorbent materialwithin the body, said body having an air passage in its opposite endextending 1 up through the absorbent material and then downwardly andterminating in the filler adjacent said opposite end, whereby air drawnthrough the air passage at one end of the body must pass through theentire 15 filler to reach the discharge opening at the opposite end ofthe body.

CLARENCE M. DAVISON.

